package client

import "github.com/google/trillian/client"

Package client verifies responses from the Trillian log.

Index

Functions

func CreateAndInitTree 

func CreateAndInitTree(
	ctx context.Context,
	req *trillian.CreateTreeRequest,
	adminClient trillian.TrillianAdminClient,
	mapClient trillian.TrillianMapClient,
	logClient trillian.TrillianLogClient) (*trillian.Tree, error)

CreateAndInitTree uses the adminClient and mapClient to create the tree described by req. If req describes a MAP tree, then this function will also call the InitMap function using mapClient. Internally, the function will continue to retry failed requests until either the tree is created (and if necessary, initialised) successfully, or ctx is cancelled.

func InitLog 

func InitLog(ctx context.Context, tree *trillian.Tree, logClient trillian.TrillianLogClient) error

InitLog initialises a freshly created Log tree.

func InitMap 

func InitMap(ctx context.Context, tree *trillian.Tree, mapClient trillian.TrillianMapClient) error

InitMap initialises a freshly created Map tree.

Types

type LogClient 

type LogClient struct {
	LogVerifier
	LogID int64
	// contains filtered or unexported fields
}

LogClient represents a client for a given Trillian log instance.

func New 

func New(logID int64, client trillian.TrillianLogClient, verifier LogVerifier) *LogClient

New returns a new LogClient.

func NewFromTree 

func NewFromTree(client trillian.TrillianLogClient, config *trillian.Tree) (*LogClient, error)

NewFromTree creates a new LogClient given a tree config.

func (*LogClient) AddLeaf 

func (c *LogClient) AddLeaf(ctx context.Context, data []byte) error

AddLeaf adds leaf to the append only log. Blocks until it gets a verifiable response.

func (*LogClient) GetAndVerifyInclusionAtIndex 

func (c *LogClient) GetAndVerifyInclusionAtIndex(ctx context.Context, data []byte, index int64) error

GetAndVerifyInclusionAtIndex updates the log root and ensures that the given leaf data has been included in the log at a particular index.

func (*LogClient) GetByIndex 

func (c *LogClient) GetByIndex(ctx context.Context, index int64) (*trillian.LogLeaf, error)

GetByIndex returns a single leaf at the requested index.

func (*LogClient) ListByIndex 

func (c *LogClient) ListByIndex(ctx context.Context, start, count int64) ([]*trillian.LogLeaf, error)

ListByIndex returns the requested leaves by index.

func (*LogClient) QueueLeaf 

func (c *LogClient) QueueLeaf(ctx context.Context, data []byte) error

QueueLeaf adds a leaf to a Trillian log without blocking. AlreadyExists is considered a success case by this function.

func (*LogClient) UpdateRoot 

func (c *LogClient) UpdateRoot(ctx context.Context) (*trillian.SignedLogRoot, error)

UpdateRoot retrieves the current SignedLogRoot, verifying it against roots this client has seen in the past, and updating the currently trusted root if the new root verifies.

func (*LogClient) VerifyInclusion 

func (c *LogClient) VerifyInclusion(ctx context.Context, data []byte) error

VerifyInclusion updates the log root and ensures that the given leaf data has been included in the log.

func (*LogClient) WaitForInclusion 

func (c *LogClient) WaitForInclusion(ctx context.Context, data []byte) error

WaitForInclusion blocks until the requested data has been verified with an inclusion proof. This assumes that the data has already been submitted. Best practice is to call this method with a context that will timeout.

func (*LogClient) WaitForRootUpdate 

func (c *LogClient) WaitForRootUpdate(ctx context.Context, waitForTreeSize int64) (*trillian.SignedLogRoot, error)

WaitForRootUpdate repeatedly fetches the Root until the fetched tree size >= waitForTreeSize or until ctx times out.

type LogVerifier 

type LogVerifier interface {
	// VerifyRoot verifies that newRoot is a valid append-only operation from trusted.
	// If trusted.TreeSize is zero, an append-only proof is not needed.
	VerifyRoot(trusted, newRoot *trillian.SignedLogRoot, consistency [][]byte) error
	// VerifyInclusionAtIndex verifies that the inclusion proof for data at index matches
	// the currently trusted root. The inclusion proof must be requested for Root().TreeSize.
	VerifyInclusionAtIndex(trusted *trillian.SignedLogRoot, data []byte, leafIndex int64, proof [][]byte) error
	// VerifyInclusionByHash verifies the inclusion proof for data
	VerifyInclusionByHash(trusted *trillian.SignedLogRoot, leafHash []byte, proof *trillian.Proof) error
	// BuildLeaf runs the leaf hasher over data and builds a leaf.
	BuildLeaf(data []byte) (*trillian.LogLeaf, error)
}

LogVerifier verifies responses from a Trillian Log.

func NewLogVerifier 

func NewLogVerifier(hasher hashers.LogHasher, pubKey crypto.PublicKey) LogVerifier

NewLogVerifier returns an object that can verify output from Trillian Logs.

func NewLogVerifierFromTree 

func NewLogVerifierFromTree(config *trillian.Tree) (LogVerifier, error)

NewLogVerifierFromTree creates a new LogVerifier using the algorithms specified by *trillian.Tree.

type MapVerifier 

type MapVerifier struct {
	Hasher hashers.MapHasher
	PubKey crypto.PublicKey
}

MapVerifier verifies protos produced by the Trillian Map.

func NewMapVerifierFromTree 

func NewMapVerifierFromTree(config *trillian.Tree) (*MapVerifier, error)

NewMapVerifierFromTree creates a new MapVerifier.

func (*MapVerifier) VerifyMapLeafInclusion 

func (m *MapVerifier) VerifyMapLeafInclusion(smr *trillian.SignedMapRoot, leafProof *trillian.MapLeafInclusion) error

VerifyMapLeafInclusion verifies a MapLeafInclusion response.

func (*MapVerifier) VerifySignedMapRoot 

func (m *MapVerifier) VerifySignedMapRoot(smr *trillian.SignedMapRoot) error

VerifySignedMapRoot verifies the signature on the SignedMapRoot.

type MockLogClient 

type MockLogClient struct {
	// contains filtered or unexported fields
}

MockLogClient supports applying mutations to the return values of the TrillianLogClient

func (*MockLogClient) AddSequencedLeaf 

func (c *MockLogClient) AddSequencedLeaf(ctx context.Context, in *trillian.AddSequencedLeafRequest, opts ...grpc.CallOption) (*trillian.AddSequencedLeafResponse, error)

AddSequencedLeaf forwards requests.

func (*MockLogClient) AddSequencedLeaves 

func (c *MockLogClient) AddSequencedLeaves(ctx context.Context, in *trillian.AddSequencedLeavesRequest, opts ...grpc.CallOption) (*trillian.AddSequencedLeavesResponse, error)

AddSequencedLeaves forwards requests.

func (*MockLogClient) GetConsistencyProof 

func (c *MockLogClient) GetConsistencyProof(ctx context.Context, in *trillian.GetConsistencyProofRequest, opts ...grpc.CallOption) (*trillian.GetConsistencyProofResponse, error)

GetConsistencyProof forwards requests and optionally corrupts responses.

func (*MockLogClient) GetEntryAndProof 

func (c *MockLogClient) GetEntryAndProof(ctx context.Context, in *trillian.GetEntryAndProofRequest, opts ...grpc.CallOption) (*trillian.GetEntryAndProofResponse, error)

GetEntryAndProof forwards requests.

func (*MockLogClient) GetInclusionProof 

func (c *MockLogClient) GetInclusionProof(ctx context.Context, in *trillian.GetInclusionProofRequest, opts ...grpc.CallOption) (*trillian.GetInclusionProofResponse, error)

GetInclusionProof forwards requests and optionally corrupts the response.

func (*MockLogClient) GetInclusionProofByHash 

func (c *MockLogClient) GetInclusionProofByHash(ctx context.Context, in *trillian.GetInclusionProofByHashRequest, opts ...grpc.CallOption) (*trillian.GetInclusionProofByHashResponse, error)

GetInclusionProofByHash forwards requests and optionaly corrupts responses.

func (*MockLogClient) GetLatestSignedLogRoot 

func (c *MockLogClient) GetLatestSignedLogRoot(ctx context.Context, in *trillian.GetLatestSignedLogRootRequest, opts ...grpc.CallOption) (*trillian.GetLatestSignedLogRootResponse, error)

GetLatestSignedLogRoot forwards requests.

func (*MockLogClient) GetLeavesByHash 

func (c *MockLogClient) GetLeavesByHash(ctx context.Context, in *trillian.GetLeavesByHashRequest, opts ...grpc.CallOption) (*trillian.GetLeavesByHashResponse, error)

GetLeavesByHash forwards requests.

func (*MockLogClient) GetLeavesByIndex 

func (c *MockLogClient) GetLeavesByIndex(ctx context.Context, in *trillian.GetLeavesByIndexRequest, opts ...grpc.CallOption) (*trillian.GetLeavesByIndexResponse, error)

GetLeavesByIndex forwards requests.

func (*MockLogClient) GetLeavesByRange 

func (c *MockLogClient) GetLeavesByRange(ctx context.Context, in *trillian.GetLeavesByRangeRequest, opts ...grpc.CallOption) (*trillian.GetLeavesByRangeResponse, error)

GetLeavesByRange forwards requests.

func (*MockLogClient) GetSequencedLeafCount 

func (c *MockLogClient) GetSequencedLeafCount(ctx context.Context, in *trillian.GetSequencedLeafCountRequest, opts ...grpc.CallOption) (*trillian.GetSequencedLeafCountResponse, error)

GetSequencedLeafCount forwards requests.

func (*MockLogClient) InitLog 

func (c *MockLogClient) InitLog(ctx context.Context, in *trillian.InitLogRequest, opts ...grpc.CallOption) (*trillian.InitLogResponse, error)

InitLog forwards requests.

func (*MockLogClient) QueueLeaf 

func (c *MockLogClient) QueueLeaf(ctx context.Context, in *trillian.QueueLeafRequest, opts ...grpc.CallOption) (*trillian.QueueLeafResponse, error)

QueueLeaf forwards requests.

func (*MockLogClient) QueueLeaves 

func (c *MockLogClient) QueueLeaves(ctx context.Context, in *trillian.QueueLeavesRequest, opts ...grpc.CallOption) (*trillian.QueueLeavesResponse, error)

QueueLeaves forwards requests.

type VerifyingLogClient 

type VerifyingLogClient interface {
	// AddLeaf adds data to the Trillian Log and blocks until an inclusion proof
	// is available. If no proof is available within the ctx deadline, DeadlineExceeded
	// is returned.
	AddLeaf(ctx context.Context, data []byte) error
	// VerifyInclusion ensures that data has been included in the log
	// via an inclusion proof.
	VerifyInclusion(ctx context.Context, data []byte) error
	// VerifyInclusionAtIndex ensures that data has been included in the log
	// via in inclusion proof for a particular index.
	VerifyInclusionAtIndex(ctx context.Context, data []byte, index int64) error
	// UpdateRoot fetches and verifies the current SignedTreeRoot.
	// It checks signatures as well as consistency proofs from the last-seen root.
	UpdateRoot(ctx context.Context) error
	// Root provides the last root obtained by UpdateRoot.
	Root() trillian.SignedLogRoot

	// GetByIndex returns a single leaf. Does not verify the leaf's inclusion proof.
	GetByIndex(ctx context.Context, index int64) (*trillian.LogLeaf, error)
	// ListByIndex returns a contiguous range. Does not verify the leaf's inclusion proof.
	ListByIndex(ctx context.Context, start, count int64) ([]*trillian.LogLeaf, error)
}

VerifyingLogClient is a client that verifies output from Trillian.

Source Files

admin.go log_client.go log_interface.go log_verifier.go map_verifier.go mock_log_client.go

Directories

PathSynopsis
client/backoffPackage backoff allows retrying an operation with backoff.
Version
v1.0.7
Published
Mar 1, 2018
Platform
js/wasm
Imports
18 packages
Last checked
4 hours ago –

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